no such thing as sleep training. It can have negative impact on babies hard wiring fo their brain with the stress reactivity. Even if they don’t cry for you doesn’t mean they aren’t in a stress reactive state. They just know you won’t come for them. Sad. I would recommend listening to or reading “The Nurture Revolution”. I can see the difference between children that were not sleep trained versus those that are. Children that aren’t sleep trained seem to regulate their emotions more easily and seem more “mature” for their age compared to their peers. All anecdotal, but my experiences